j2s-development] [New Feature] Re: Dynamic Loading of JavaScript files

[Zhou R. <jo...@sj...>]

Hi,

Finally,  function of loading Java2Script's *.js files dynamically are 
implemented.
 From now on, programmers do  not need to manage classes order to get 
Java2Script applications correctly run. That is to say, loading *.js is 
transparent to programmers.

This feature will be the base technology of other coming features, such 
as earlier discussed Class.forName (...).

And by loading Java2Script's *.js files dynamically, we can now generate 
a line of JavaScript code or a "javascript:..." link for a J2S 
application, which can be hosted inside other sites' HTML pages. Maybe 
we can call it "A Link An Application". Read more about this in the blog 
article: http://j2s.sourceforge.net/blog/2006/07/11/a-link-an-application/

There are lots of bugs about this features. Some more tests may be required.

Please check out the latest codes from SVN repository.

And something should be mentioned:
1. Those lots of *.js in net.sf.j2s.lib/j2slib/.../*.js are generated 
from net.sf.j2s.java.core, net.sf.j2s.ajax and 
net.sf.j2s.java.org.eclipse.swt.  You can run target j2slib.pack.lib of 
ant build j2s.core.build in project net.sf.j2s.lib to copy and pack the 
necessary files without checking out from the slow SVN.
2. Most of  former *.z.js are removed. Only a new "j2slib.z.js" is left 
as the entry to all existed *.js units. So now, in the "Java2Script 
builder" property page "Add Libraries" button will open Dialog for 
choosing the only-one "j2slib.z.js" library. Just choose the library to 
make things work. And now "Add Resources", "Add Projects" and other 
buttons are now make no sense. And the those classes in the tree view 
also have no meanings now. These things will be removed or changed in 
the near future. For more details, please study the generated 
Java2Script application HTML file for more details.
3. ...

I think later I need to write something to make the big change clear.

Regards

/js

Soheil Hassas Yeganeh wrote:
> I did not mean to use a method like the one used in dojo. I was just
> arguing about the idea.
> Implementing a method for import a Class( import java.util.* -->
> j2s_import("java.util.*")), and an implementation for Class.forName(),
> is really enough for dynamic loading of java2script. May be
> implementing java.reflect.* would be better.
> I think using a method like this, will provide us a dynamic loading
> method with the developer transparency preserved.
>
> Regards,
> Soheil
>
> On 6/15/06, Josson Smith <jo...@sj...> wrote:
>   
>> Dynamic loading *.js will be complex things.
>>
>> And I know that dojo toolkit is using its dynamic loading mechanism of
>> JavaScript files.
>>
>> For Java2Script,
>> First, the number of *.js files is somewhat huge already. It is more
>> than 200. Setup the connections will require a lot of extra times.
>> Second, referencing, sub-referencing, and sub-sub-referencing, ... may
>> reference most of the classes. It requires some algorithm to cut off
>> those unnecessary sub-referencing until it's necessary.
>> Third, Java programmers should not be required to know things about
>> dynamic loading of JavaScript.
>>
>> More discussions are needed.
>>
>>
>> Soheil Hassas Yeganeh wrote:
>>     
>>> Oh, a very nice doco! I found here :
>>> http://ajaxpatterns.org/On-Demand_Javascript
>>>
>>> On 6/12/06, Soheil Hassas Yeganeh <soh...@gm...> wrote:
>>>
>>>       
>>>> Hi,
>>>> I've a proposal for loading javascript files, dynamically. Suppose we
>>>> have a lot of javascript files generated. As it occures in many
>>>> applications many of the javascript files are not used frequently.
>>>> So, Now, if we want to run that application we have to import a lot of
>>>> js files in the html. This will make the application very slow and
>>>> heavy.
>>>> So, we need a dynamic javascript loading mechanism. If we have this
>>>> mechanism, we can also implement methods like Class.forName().
>>>> We can use .z files generated by j2s to dynamically loading need
>>>> javascript files for each class.
>>>> In other words, we need something like the Bindows' BiScriptLoader.
>>>> Regards,
>>>> Soheil Hassas Yeganeh
>>>>
>>>>
>>>>         
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>>>
>>>
>>>       
>> --
>> Regards
>>
>> /js
>>
>>
>>
>>
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